Improved cap for preserve-jars



adelphia, county of Philadelphia, State of UNITED STATES PATENT OFFICE.

IMPROVED CAP FOR PRESE'RVE-JARS.

Specification forming part of Letters Patent No. 74.249, dated February 11, ISGS.

To all whom it may concern;

Be it known that I, S. B. ROWLEY, of Phil.-

Pennsylvania, have invented an Improved Gap for PreservingfVessels; and I do hereby declare the following to be a full, clear, and exact description of the same. A

My invention consists in the employment, as a cap for preserve-jars, of a thin metal disk, shaped and corrugated in the manner `described hereinafter7 so that it may be of increased strength and rigidity.

In order to enable others skilled in the art to make and use my invention7 I will now proceed to describe its construction and operation, reference being had to the accompanying drawings, which form a part of this speciiica-` tion, and in whieh- Figure lis a vertical section of my improved cap and fastener for preserve-jars; Fig. 2 a plan view, andFig. 3 an exterior view, of the upper end of the jar.

The jar terminates at the top in an annular rib, a, which surrounds the mouth A, and at the upper edge and exterior of which is a rounded annular projection or lip, b, and beneath the latter, on the neck of the jar, is formed a shoulder, d, for receiving the gumelastic ring e, the latter being so stretched as to pass over the lip!) before it reaches its pov sition on the said shoulder.

The cap B consists of thin metal, so formed by dies as to have a rounded or dome-shaped top, f, with radial corrugations, a central depression, g, and a flange, h, the latter bearing on the gu1n-elastic ring e.

D is a yoke, made of thin wire, so as to be slightly elastic, and havingin the middle an abrupt bend, m, adapted to the depression g y Vin the cap, the yoke being bent downward at its opposite ends, and these endsbeing again bent at so, so as to catch beneath opposite iuclined projections, y, on the exterior of the neck of the jar.` The topf of the capB is cor. rugated, as shown in Fig..2, the corrugations radiating from the central depression, g,.and

imparting tothe metal, even if the latter be very thin, such a strength that it cannot be .t

forced out of shape by the pressure exerted on it on the application of the yoke, which is simply turned by the han-d in the depression as a center until the bent ends x catch bea tight joint, this pressure being continuous,

owing to the elasticity of the yoke.

I claim as my invention and desire to secure by Letters Patent- A cap for preservejars, consisting of a `thin metal plate, formed and corrugated as specied. I y l In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

s. .n..nowLEr Witnesses:

(l. E. FOSTER, W. J. R. DELANEY. 

